The GTX 670 Ti name was used by Nvidia internally and some suppliers simply picked up the name. The rumour has it that Nvidia planned to launch it as the GTX 670 Ti but the GPU performed just a bit better than expected and thus it was decided to launch it as the GTX 680. Of course, other side of the story comes from Nvidia's "disappointment" with AMD's Tahiti GPU and Radeon HD 7900 series that was detailed back in January and it might be the point in time when Nvidia decided that GK104 could be launched as the GTX 680.

Well, last time around the GTX580 was top single-GPU card, GTX590 was the dual-GPU and both were based on GF110. GTX460 was based on GF104. If the nomenclature remains the same, and the GTX680 is based on GK104 (i..e. is a mid-market card) then what product will use GK110? GTX780?